Quoting someone's summary piece is one thing, we can find as many on any side as the other:

http://www.cptips.com/trnoptn.htm
http://www.training4cyclists.com/vo2...titive-cycling
http://www.professionalcycling.info/...he-off-season/
http://www.active.com/triathlon/Arti...ur_VO2_max.htm
http://www.johnberardi.com/articles/training/madmax.htm


I prefer articles which quotes the original work and their data with discussions of methodologies and results:

http://www.pponline.co.uk/encyc/1030.htm
http://www.pponline.co.uk/encyc/0600b.htm


simplyred's analysis is pretty interesting. Forrest, how are you gauging your intensity on the hill-repeats? Are you going by power-meter readouts or HRM? I find on these medium repeats that a single moment of too-much intensity will ruin the rest of the interval because you'll be trying to recover. Backing of just slightly can add those 10-13 seconds.